Recent content by xzyan

With a reasonable pumping level, I expect to see something similar like this: where the green curve is the population of upper lasing level, blue curve is the population of ground state, orange curve is the population of lower lasing level. At the moment, the model is not fully...

Yes it is or should be solvable at steady state. The rate equations are derived by myself, that's why I thought the problem now is not how to solve them but how to correct them (if I was wrong). According to the unexpected result, I think I was wrong at some where in the equation deriving...

I've changed the 4th and 5th equations from intensity of the beam (W/cm2) to number of photons, which scaling the dy(4) and dy(5) to around E19 rather than 0.2 and 1. However, the MATLAB still keeps calculating and calculating. Later, I tried another ode function called 'ode15s', which used...

Thanks! I realized that after you mention about the scaling:biggrin:. Tried to modified it in the post to avoid misleading but it seems I cannot modify it anymore.

Thanks a lot for your reply. That's a good idea. I'll try to realize it. Many thanks!

Hello everyone, I'm new here and new to Matlab. I hope I do place the post in the right place. First of all, thanks for viewing my post. Please bear with my English. I tried my best to explain everything clear. If you have any question about anything I wrote or spot any fault, please tell...